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Literature summary extracted from

  • Mahajan, R.; Singh, R.
    Properties of pyrophosphate:D-fructose-6-phosphate phosphotransferase from endosperm of developing wheat (Triticum aestivum L.) grains (1989), Plant Physiol., 91, 421-426.
    View publication on PubMedView publication on EuropePMC

Activating Compound

EC Number Activating Compound Comment Organism Structure
2.7.1.90 D-fructose 2,6-bisphosphate
-
Triticum aestivum

General Stability

EC Number General Stability Organism
2.7.1.90 ethylene glycol stabilizes during purification, almost complete loss of activity without Triticum aestivum

Inhibitors

EC Number Inhibitors Comment Organism Structure
2.7.1.90 bicarbonate
-
Triticum aestivum
2.7.1.90 Cl-
-
Triticum aestivum
2.7.1.90 additional information no inhibition by acetate, carbonate Triticum aestivum
2.7.1.90 NO3- no inhibition Triticum aestivum
2.7.1.90 phosphate in the forward reaction only in presence of fructose 2,6-bisphosphate Triticum aestivum
2.7.1.90 SO42- no inhibition Triticum aestivum
2.7.1.90 sulfite
-
Triticum aestivum
2.7.1.90 thiosulfate
-
Triticum aestivum
2.7.1.90 tungstate
-
Triticum aestivum

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.7.1.90 0.025 0.033 diphosphate
-
Triticum aestivum
2.7.1.90 0.129
-
phosphate
-
Triticum aestivum
2.7.1.90 0.139 0.21 D-fructose 1,6-bisphosphate
-
Triticum aestivum
2.7.1.90 0.3 0.38 D-fructose 6-phosphate
-
Triticum aestivum

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
2.7.1.90 Co2+ no activation of forward reaction Triticum aestivum
2.7.1.90 Co2+ no activitaion Triticum aestivum
2.7.1.90 Mg2+ requirement Triticum aestivum
2.7.1.90 additional information no activation by Cu2+ Triticum aestivum
2.7.1.90 additional information no activation by Ba2+, Sn2+, Sr2+ Triticum aestivum

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
2.7.1.90 80000
-
1 * 80000 + 1 * 90000, SDS-PAGE Triticum aestivum
2.7.1.90 90000
-
1 * 80000 + 1 * 90000, SDS-PAGE Triticum aestivum
2.7.1.90 170000
-
gel filtration Triticum aestivum

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.7.1.90 diphosphate + D-fructose 6-phosphate Triticum aestivum
-
phosphate + D-fructose 1,6-bisphosphate
-
r

Organism

EC Number Organism UniProt Comment Textmining
2.7.1.90 Triticum aestivum
-
cv. WH-157
-

Purification (Commentary)

EC Number Purification (Comment) Organism
2.7.1.90 partial, 127fold Triticum aestivum

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.7.1.90 endosperm
-
Triticum aestivum
-
2.7.1.90 seed germinating Triticum aestivum
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
2.7.1.90 1.5
-
partially purified enzyme Triticum aestivum

Storage Stability

EC Number Storage Stability Organism
2.7.1.90 -20°C, in 50 mM HEPES buffer, pH 7.5, 10 mM 2-mercaptoethanol, 0.5 mM EDTA, 1 mM MgCl2, 5 mM KCl, 30% ethylene glycol, more than 1 month Triticum aestivum

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.7.1.90 diphosphate + D-fructose 6-phosphate
-
Triticum aestivum phosphate + D-fructose 1,6-bisphosphate
-
r
2.7.1.90 diphosphate + D-fructose 6-phosphate specific for diphosphate as phosphor donor Triticum aestivum phosphate + D-fructose 1,6-bisphosphate
-
r

Subunits

EC Number Subunits Comment Organism
2.7.1.90 dimer 1 * 80000 + 1 * 90000, SDS-PAGE Triticum aestivum

Synonyms

EC Number Synonyms Comment Organism
2.7.1.90 PFP
-
Triticum aestivum

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
2.7.1.90 30
-
15 min stable Triticum aestivum
2.7.1.90 50
-
t1/2: 15 min Triticum aestivum
2.7.1.90 60
-
above, complete inactivation Triticum aestivum

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.7.1.90 7.5
-
forward reaction, D-fructose 2,6-bisphosphate has no effect on pH-optimum Triticum aestivum

Ki Value [mM]

EC Number Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
2.7.1.90 0.78
-
phosphate versus fructose 6-phosphate, pH 7.5, 25°C, in presence of fructose 2,6-bisphosphate at saturating concentration Triticum aestivum
2.7.1.90 1.2
-
phosphate versus diphosphate, pH 7.5, 25°C, in presence of fructose 2,6-bisphosphate at saturating concentration Triticum aestivum